Nature Communications (Jul 2021)

SUMOylation of SAMHD1 at Lysine 595 is required for HIV-1 restriction in non-cycling cells

  • Charlotte Martinat,
  • Arthur Cormier,
  • Joëlle Tobaly-Tapiero,
  • Noé Palmic,
  • Nicoletta Casartelli,
  • Bijan Mahboubi,
  • Si’Ana A. Coggins,
  • Julian Buchrieser,
  • Mirjana Persaud,
  • Felipe Diaz-Griffero,
  • Lucile Espert,
  • Guillaume Bossis,
  • Pascale Lesage,
  • Olivier Schwartz,
  • Baek Kim,
  • Florence Margottin-Goguet,
  • Ali Saïb,
  • Alessia Zamborlini

DOI
https://doi.org/10.1038/s41467-021-24802-5
Journal volume & issue
Vol. 12, no. 1
pp. 1 – 15

Abstract

Read online

SAMHD1 is a cellular dNTPase proposed to inhibit HIV-1 reverse transcription in non-cycling immune cells by limiting dNTP substrate supply; its anti-viral but not dNTPase function is downregulated by phosphorylation of T592. Here, Martinat et al. describe an additional SUMOylation at residue K595, which promotes the dNTPase-independent restriction activity.